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Discussion papers | Copyright
https://doi.org/10.5194/os-2017-82
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Oct 2017

Research article | 24 Oct 2017

Review status
This discussion paper is a preprint. It has been under review for the journal Ocean Science (OS). The revised manuscript was not accepted.

Rising bubbles as mechanism for scavenging and aerosolization of diatoms

Roman Marks1, Ewa Górecka2, Kevin Mc Cartney3, and Wojciech Borkowski1 Roman Marks et al.
  • 1University of Szczecin, Faculty of Geosciences, Physical Oceanography Unit, Mickiewicza 16, 70-383 Szczecin, Poland
  • 2Natural Sciences Education and Research Centre, University of Szczecin, Palaeoceanology Unit, Mickiewicza 16a, 70-383 Szczecin, Poland
  • 3Department of Environmental Sciences and Sustainability, University of Maine at Presque Isle, Presque Isle, ME 04769, USA

Abstract. Bubbles rising in clean saline water cause steady displacement of ions at the bubble boundaries that separate anions and cations based on ion mass. Anions of greater mass are resistant to displacement and concentrate on the bubble upper half sphere, while smaller and less massive cations are displaced towards lower pressure of the bottom half sphere. The separation into anionic and cationic domains on the bubble curvatures creates electric polarity that may draw particulates dispersed in the water. Viable diatoms as well as bacteria develop negative charge on outer membranes, that are attracted to the cationic bubble bottom half sphere and pocket. When bubble bursts at the air/water interface the diatoms and bacteria are ejected into the air with initial or secondary jet droplets that are projected upward with a small water column derived from a cationic vortex. Experiments conducted in brackish and oceanic saline water on Nanofrustulum and Cyclotella cells indicated that the averaged concentration in jet droplets compared to the original water volume (here termed the enrichment factor) for aerosolized diatoms may range from 8 to 307.

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Roman Marks et al.
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Experiments indicated that cation-mediated electrostriction plays a principal role in bubble vorticity and related attraction/scavenge of bacteria and diatoms by rising bubbles in saline water. The mechanism is important for global matter cycling and related process of matter accumulation near the ocean surface. Massive and long-term bubble-cationic-rotational processing of matter in the oceanic water and in droplets suspended in air may likely incepted the bio-matter evolution on the Earth.
Experiments indicated that cation-mediated electrostriction plays a principal role in bubble...
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